Well, as you can tell by my previous post I'm pretty gung-ho on the Stealth heads. Here's my logic...

used 906's - a deal at $50.00
hot tank, magnaflux and surface $150.00
bowl hogged for 2.14/1.81 valves $75.00
valves - stainless $200.00
at this point there is nothing done to the guides, ports, spring seats or valve seats.

I looked at what I had invested and what still needed to be done and weighed that against the Stealth heads. The Stealth heads just plain made sense. I was able to recover my expense from a guy who races in a class that requires stock iron heads.